CPW-Fed Flexible Ultra-Wideband Antenna for IoT Applications

In this article, an inkjet-printed circular-shaped monopole ultra-wideband (UWB) antenna with an inside-cut feed structure was implemented on a flexible polyethylene terephthalate (PET) substrate. The coplanar waveguide (CPW)-fed antenna was designed using ANSYS high-frequency structural simulator (HFSS), which operates at 3.04-10.70 GHz and 15.18-18 GHz (upper Ku band) with a return loss < -10 dB and a VSWR < 2. The antenna, with the dimensions of 47 mm x 25 mm x 0.135 mm, exhibited omnidirectional radiation characteristics over the entire impedance bandwidth, with an average peak gain of 3.94 dBi. The simulated antenna structure was in good agreement with the experiment's measured results under flat and bending conditions, making it conducive for flexible and wearable Internet of things (IoT) applications.

Automated summary

This article presents an inkjet-printed circular-shaped monopole ultra-wideband (UWB) antenna on a flexible PET substrate, demonstrating omnidirectional radiation characteristics and good agreement between simulated and experimental results, suitable for flexible and wearable Internet of Things applications.